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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Creation of highly stable selenium nanoparticles capped with hyperbranched polysaccharide in water.
Langmuir : the ACS Journal of Surfaces and Colloids 2010 November 17
Water-dispersible selenium nanoparticles (SeNPs) were created by using natural hyperbranched polysaccharide (HBP) as the stabilizer and capping agent under extremely safe conditions. The structure, morphology, size, and stability of the nanocomposites were investigated by transmission electron microscopy (TEM), atomic force microscopy (AFM), and static and dynamic light scattering (DLS) measurements. The results revealed that the spherical selenium nanoparticles (mean particle size of about 24 nm) were ligated with HBP to form nanocomposites (Se-HBP) in aqueous solution and were stable for over one month. In our findings, supported by the results of FTIR, TEM, AFM, and DLS, SeNPs were capped with the HBP macromolecules, as a result of strong physical adsorption of OH groups on Se surfaces, leading to a highly stable structure of Se nanoparticles in water. This work provided reaction sites for the complexation between HBP and Se to fabricate well-dispersed Se nanoparticles in aqueous system with potential bioapplications.
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